📄 uploadservlet.java

📁 oa办公系统
💻 JAVA
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package cn.jx.ecjtu.oa.servlets.contract;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class UpLoadServlet extends HttpServlet {

	/**
	 * 上传Excel文件
	 */
	public UpLoadServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void dopost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String path = getServletContext().getRealPath("/");
		path = path + java.io.File.separator + "upload";
		DiskFileItemFactory factory = new DiskFileItemFactory();
		// maximum size that will be stored in memory
		factory.setSizeThreshold(4096);
		// the location for saving data that is larger than getSizeThreshold()
		factory.setRepository(new File(path + java.io.File.separator + "tmp"));

		ServletFileUpload upload = new ServletFileUpload(factory);
		// maximum size before a FileUploadException will be thrown
		upload.setSizeMax(1024 * 1024);

		try {
			List fileItems = upload.parseRequest(request);
			// assume we know there are two files. The first file is a small
			// text file, the second is unknown and is written to a file on
			// the server
			for (Iterator i = fileItems.iterator(); i.hasNext();) {
				try {
					FileItem fi = (FileItem) i.next();
					// filename on the client
					String fileName = fi.getName();
					File f=new File(fileName);
					fileName=f.getName();
					// save comment and filename to database

					// write the file
					fi.write(new File(path, fileName));
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occure
	 *             
	 *             
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the GET method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the POST method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
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